Cmake config and project layout

[Mezozoysky]

Added the ability to install signals as a library and to look for it using find_package(FTengSignals), etc..
United everything under one umbrella CMake-project.
Targets are FTengSignals::Signals, FTengSignals::TestApp, FTengSignals::Benchmarks.

[Mezozoysky]

Looks like nobody home :-|

[dumblob]

Well, people are following this repo but @TheWisp does not seem very active (last activity on GitHub was in December 2021 when he/she forked https://github.com/TheWisp/coroutine_experiments from upstream).

So I would leave this PR open and maybe one day this repo will make it under some organization or it will be resurrected by @TheWisp 😉.

[Mezozoysky]

Hi, @dumblob!
I made sure the repository had been inactive for a while and merged this PR into my fork. Since license is MIT I plan to continue developing here https://github.com/Mezozoysky/FTengSignals.

[dumblob]

That's good news @Mezozoysky !

Could you turn on the "Issues" tab in your repository so that we can discuss some potential bugs, suggestions, improvements etc.?

I have commented in this original repo on several issues which I consider having the highest priority: https://github.com/TheWisp/signals/issues?q=is%3Aissue+involves%3Adumblob . I could then transfer these suggestions to your new repo to have some roadmap starting point if you like.

[Mezozoysky]

I've turned on "Issues" and "Discussions", You welcome!